With THIS Game, the Xplorer 64's In-Game Trainer must remain Disabled (OFF)Otherwise: Turn OFF, N64 and with Xplorer 64 still in place, switch T.W.I.N.E. with another Game.Turn on N64. Let this other Game Boot (Picture on Screen). Turn OFF, N64 and put back T.W.I.N.E.The Xplorer 64 can only handle a very limited amount of codes with the In-Game Trainer Disabled !